Somatosensory Pathways Flashcards Preview

Thought, Sense and Movement > Somatosensory Pathways > Flashcards

Flashcards in Somatosensory Pathways Deck (21):
1

Which four sensory modalities does the Anterolateral Sytem relay?

Pain
Temperature
Non-discriminative touch
Pressure

2

Which three sensory modalities do the Dorsal Columns relay?

Tactile sense
Vibratory sense
Positional sense

3

Which sensory modalities do the somatosensory pathways to the cerebellum relay?

Proprioception

4

Name the five Anterolateral systems?

Spinohypothalamic tract
Spinotectal tract
Spinomesencephalic tract
Spinoreticular tract
Spinothalamic tract

5

Name the two Dorsal columns?

Fasiculus Cuniatus - lateral
Fasiculus Gracilis - medial

6

Name the three Somatosensory pathways to the cerebellum?

Rostral spinocerebellar tract
Posterior spinocerebellar tract - Ipsi-lateral
Anterior spinocerebellar tract - Contra-lateral

7

Within the dorsal horn of the spinal cord, which laminae does Pain and Temperature synapse into?

Laminae I/II

8

Within the dorsal horn of the spinal cord, which laminae does proprioception synapse into?

Laminae V

9

Within the dorsal horn of the spinal cord, which laminae does mechanoreception synapse into?

Laminae III/IV

10

Which tract does 'conscious proprioception and fine touch' ascend within and how does it travel?

Dorsal column - Ipsilateral

11

Which tract does 'pain and temperature' ascend within and how does it travel?

Lateral spinothalamic tract - contralateral

12

Which tract does 'pressure and crude touch' ascend within and how does it travel?

Anterior spinothalamic - contralateral

13

How does the cerebellum receive Ipsilateral proprioception?

Fibres travelling ipsilaterally travel up the Posterior spinocerebellar tract
Fibres travelling contralaterally travel up the Anterior spinocerbellar tract and enter the cerebellum via the superior cerebellar peduncle.

14

Which tract is affected by sensory ataxia?

Dorsal columns

15

In sensory ataxia, the loss of concious proprioception leads to what symptoms?

Broad gait + stomping
Positive Rhomberg's sign

16

In sensory ataxia, the loss of fine touch leads to what symptoms?

loss of two-point discrimination

17

Where does fine touch from the face go to?

Chief sensory nucleus of V passing contralateral beyond this point

18

Where does pain and temperature from the head and neck go to?

Spinal nucleus of V (continuous with dorsal horn laminae I/II), it passes contralaterally beyond this point

19

After fine touch fibres have crossed over inside the lower medulla, which fibre tract takes them to the thalamus?

Medial lemniscus

20

How does the posterior spinocerebellar tract enter the cerebellum?

Via the inferior cerebellar peduncle

21

Pain and temperature fibres from the thalamus go to which three places?

Insula
Primary somatosensory cortex (post-central gyrus)
Cingulate gyrus (limbic system)